body{
    margin: 0;
    padding: 0;
}
#oriention_mask{
    z-index: 2;
    position: absolute;
    visibility:hidden;
    width:100vw;
    height:100vh;
    color:#ffffff;
    background-color:#000000;
    margin: 0 auto;
    text-align: center;
    display: block;
    line-height: 100vh;
}
#loading_hold{
    z-index: 3;
    width:100vw;
    height:100vh;
    position: absolute;
    /*border: 0px solid #00ff00;*/
    /*display:inline-block;*/
}
#videobox{
    position: absolute;z-index: 100;
    width: 100%;
    height: 100%;
    overflow: hidden;
    display:none;
}
#video{
    position: absolute;
    /*top:-50px;*/
}
.pa{
    position: absolute;
}
.w{
    width:100%;
}
.h{
    height: 100%;
}
#assembly{
    z-index: 3;
}
.csa{
    /* width: 100vw; */
    /* height: 100vh; */
    /* background-color: rgba(0, 0, 0, 0.59); */
    text-align: center;
}
.close{
    width: 10%;
    position: absolute;
    right: 7%;
    top: 3%;
}
.shangxiazuoyoucenter{
    display: table-cell;
    vertical-align: middle;
    text-align: center;        
}